<!DOCTYPE html>
<html>
<head>
<link rel="author" title="Sammy Gill" href="mailto:sammy.gill@apple.com">
<meta name="assert" content="Margin, border, and padding of subgrids should influence the offset of items in the same baseline alignment context">
<link rel="help" href="https://drafts.csswg.org/css-grid-2/#subgrid-item-contribution">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<style>
html,body {
  color:black; background-color:white;  padding:0; margin:0;
}
.grid {
    font:16px/1 Ahem;
    display: inline-grid;
    border: 1px solid black;
    grid-template-columns: auto auto;
}
.subgrid {
    display: grid;
    grid-template-rows: subgrid;
    border: 9px solid blue;
    margin-top: 15px;
    padding-top: 6px;
}
.first-baseline {
    align-self: baseline;
}
</style>
</head>
<body onload="checkLayout('.first-baseline')">
<div id="target" class="grid">
    <div data-offset-y="31" class="first-baseline">X</div>
    <div class="subgrid">
        <div data-offset-y="31"  class="first-baseline">X</div>
    </div>
</div>
</body>
</html>
